Preheat the grill to a medium-high heat.
Husk your corn. I like to keep the husks attached, so that I have something
In a small bowl, combine the mayonnaise, sour cream, cilantro, and parmesan in a bowl and mix everything together.
Place your corn on a grill rack sprayed with cooking spray. Cook the ears of corn approx 12 minutes or until corn is lightly browned, turning frequently.
Place corn on a plate or platter and spread the mayonnaise/sour cream all over the corn and sprinkle with chili or cayenne pepper!;
Drizzle lime juice to preference.